The original use of AC_ARG_WITH is buggy and causes expat support
to be *disabled* if "--with-expat" is passed to configure.

Upstream status: pending

Index: log4c-1.2.4/configure.in
===================================================================
--- log4c-1.2.4.orig/configure.in
+++ log4c-1.2.4/configure.in
@@ -217,9 +217,9 @@ AC_ARG_WITH(expat,
                     have any effect and Log4C uses some bundled yacc/lex code
                     for parsing it's configuration file.
                     ]),
-                    with_expat=no,
+                    [],
                     with_expat=yes)
-if test x$with_expat = xyes ; then
+if test x$with_expat != xno ; then
  use_expat=yes
  AM_PATH_EXPAT(1.95.1)
 fi